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Finding the Fourth Proportional to 503.58, 755.10 and 272.40

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Solution

The fourth proportional to 503.58, 755.10 and 272.40 is: 408.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.58 : 755.10 = 272.40 : x
  2. Step 2: Convert to fraction form
    503.58/755.10 = 272.40/x
  3. Step 3: Cross multiply
    503.58x = 755.10 × 272.40
  4. Step 4: Simplify right side
    503.58x = 205,689.24
  5. Step 5: Solve for x
    x = 205,689.24/503.58
  6. Step 6: Final answer
    x = 408.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.